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As Tuesday dawned residents of the planet's dirtiest urban center encountered inhaling dangerously toxic air that was classified as the "alarming" level.

Record-Breaking Air Quality Readings

Multiple areas of the city registered an pollution measurement above 500, which translates to a tenfold increase over the recommended level established by the World Health Organization.

Certain monitoring stations, levels of dangerous airborne particles hit highs of 1,800, equating to fifteen to twenty times exceeding healthy limits.

Fireworks Prohibition and Current Changes

For the past four years, officials had maintained a total prohibition on the distribution and bursting of fireworks during Diwali due to their substantial impact to the dangerous smog that covers the capital as colder weather begins.

Yet in recent months, the recently formed city administration approached the supreme court to seek a relaxation of the prohibition.

The suggestion was allowing "environmentally conscious pyrotechnics" – historically doubted by environmental experts as being only roughly 30 percent less polluting – as a balance between "tradition and environment".

Legal Ruling and Reality

To the disappointment of medical and ecological advocates, the court complied with the request, specifying that eco-friendly pyrotechnics could be ignited during limited periods throughout the Diwali.

Throughout the festival evening, there was extensive flouting of the regulated periods across the city, with minimal enforcement regarding whether the firecrackers being used were actually the supposedly greener variety.

Several air quality sensors throughout Delhi registered pollution peaking around midnight to extremely hazardous readings recorded during Diwali in at least three years.

Regional Implications

The proliferation of fireworks during the celebrations also sparked a dispute with adjacent Pakistan, with authorities in Pakistan's Punjab partially attributing deteriorating pollution levels in the city of Lahore on contaminants originating in India following the festivities.

Long-Standing Environmental Crisis

Extremely elevated readings of pollution in the city have persisted as a significant challenge for more than 15 years, with the condition showing no improvement.

During Diwali, the levels of hazardous particles in the air has been observed to shoot up to seventy percent above the worst readings ever documented in Beijing, which was formerly considered as the planet's dirtiest metropolis.

Multiple Pollution Factors

The situation in the city is caused by a convergence of different contributors including heavy vehicle emissions, airborne particles, construction activities, waste incineration and pollutants from crop residue ignition in adjacent states of Punjab and Haryana.

In these regions, agricultural workers illegally ignite agricultural waste to expedite field preparation, producing toxic haze that becomes contained over the metropolitan area as cooler air sets in.

Public Health and Financial Consequences

Public health and economic consequences on the nearly 33 million people living in the metropolitan zone is significant, according to numerous studies.

The contaminated air leads to increased incidence of nervous system, cardiovascular and respiratory disorders, and can result in cancer.

The pollution is projected to be causing approximately 10k premature mortalities annually in the capital.